CN207532451U - Clearance checking scale - Google Patents

Abstract

The utility model proposes a kind of clearance checking scale, including ontology, the first distraction plate, the second distraction plate, rack, gear, adjusting knob and measuring device；First distraction plate is fixedly connected on the ontology；Second distraction plate is slidably connected to the ontology, can be slided up and down relative to first distraction plate；Rack is fixedly installed on second distraction plate, and between first distraction plate and second distraction plate；Gear is engaged with the rack for second distraction plate is driven to move up and down, and the gear is fixedly connected with a horizontally disposed first rotating shaft, and the first rotating shaft, which horizontally rotates, is set to the ontology；Adjusting knob is connect with the first rotating shaft, for driving the gear rotation；Measuring device is for the gap between the first distraction plate of measurement and the second distraction plate.

Description

Clearance checking scale

Technical field

The utility model is related to be used in a kind of total knee replacement instrument more particularly to a kind of operation of total knee replacement Clearance checking scale.

Background technology

At present, it in the operation of total knee replacement, stretches or the strutting of buckling gap, soft tissue balance evaluation and gap Size measure it is most realized by different instrument, seldom can will be in three kinds of function sets a to instrument.Such as use board-like support It opens device and carries out space distraction and soft tissue balance evaluation, clearance measurement is carried out using a series of clearance measurement block of different-thickness. Therefore surgical procedure is more complicated, and surgical instrument quantity is more.

Above- mentioned information is only used for strengthening the understanding to the background of the utility model disclosed in the background technology part, because This it can include not forming the information to the prior art known to persons of ordinary skill in the art.

Utility model content

The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide one kind can be achieved at the same time stretch or Strutting for buckling gap is continuously adjustable, and the clearance checking scale that can be measured gap size.

The additional aspect and advantage of the utility model will be set forth in part in the description, and partly will be from retouching It is apparent from stating or can be by the practice of the utility model and acquistion.

One side according to the present utility model, clearance checking scale, including ontology, the first distraction plate, the second distraction plate, tooth Item, gear, adjusting knob and measuring device；First distraction plate is fixedly connected on the ontology；Second distraction plate is slidably connected to The ontology can be slided up and down relative to first distraction plate；Rack is fixedly installed on second distraction plate, and positioned at institute It states between the first distraction plate and second distraction plate；Gear engages to drive on second distraction plate with the rack Lower movement, the gear are fixedly connected with a horizontally disposed first rotating shaft, the first rotating shaft horizontally rotate be set to it is described Ontology；Adjusting knob is connect with the first rotating shaft, for driving the gear rotation；Measuring device supports for measuring first Open the gap between plate and the second distraction plate.

An embodiment according to the present utility model, the ontology include ontology handle part and noumenon function portion, described Cavity is formed in body function portion, there are one the mounting hole with first rotating shaft coaxial line, the adjustings for the inner wall tool of the cavity Knob is set in the cavity, and the first rotating shaft is rotatably dispose in the mounting hole.

An embodiment according to the present utility model, the adjusting knob have the second shaft, and the adjusting knob passes through Second shaft is connected in the first rotating shaft.

An embodiment according to the present utility model, the ontology include ontology handle part and noumenon function portion, described Cavity is formed in body function portion, there are one the mounting hole with first rotating shaft coaxial line, the adjustings for the inner wall tool of the cavity One end that knob is set on second shaft in the cavity is connected with the first rotating shaft, and the other end is rotatably dispose in described In mounting hole.

An embodiment according to the present utility model, the mounting hole is through hole, on the outer wall in the noumenon function portion Equipped with the horizontal through slot for extending to the mounting hole, the width of the horizontal through slot is less than the diameter of mounting hole, and described the Two shafts, which are equipped with, to pass through portion so that the second shaft is located in mounting hole by the horizontal through slot.

An embodiment according to the present utility model, the axisymmetrical that two opposite second shafts are included by portion The tangent plane of arrangement, the width between two tangent planes are less than or equal to the width of the horizontal through slot, and the tangent plane is the The length of two shaft axial directions is more than or equal to the length of the mounting hole.

An embodiment according to the present utility model, the measuring device include being set to graduation mark and the setting of ontology Observation window on second distraction plate, the graduation mark of the measuring device are disposed in proximity to the ontology of second distraction plate On, the outer edge of the observation window is equipped with graticule, and when second distraction plate moves up and down, institute can be shown in the observation window Graduation mark is stated, the graticule is used to match to indicate the first distraction plate and the second distraction plate with the graduation mark shown in observation window Between gap.

An embodiment according to the present utility model, the second distraction plate include the sliding part of close ontology and are articulated in institute State the rotation section of sliding part.

An embodiment according to the present utility model, first distraction plate and the second distraction plate are equipped with consistency from top to bottom The through hole for insertion force line bar.

An embodiment according to the present utility model, the gear are spur gear, and the rack is spur rack；It is or described Gear is helical gear, and the rack is helical rack.

As shown from the above technical solution, it is the advantages of the utility model with good effect：

The clearance checking scale of the utility model, in same step i.e. realize stretch or buckling gap strut and gap Size measures.The gap width of this clearance checking scale can be continuously adjusted between the minimum and maximum, the gap with fixed thickness Measuring block is compared, and operation is more flexible, and reduces the quantity of surgical instrument.In alternative embodiments, the second distraction plate Including the sliding part close to ontology and the rotation section of the sliding part is articulated in, the state evaluation soft tissue of rotation section can be passed through Whether balance, can realize that space distraction, clearance measurement and soft tissue evaluate three functions simultaneously, be conveniently operated.

Description of the drawings

Its example embodiment is described in detail by referring to accompanying drawing, above and other feature and advantage of the utility model will It becomes readily apparent from.

Fig. 1 is the structure diagram of the clearance checking scale of one embodiment of the utility model；

Schematic diagram when Fig. 2 is display portion section in Fig. 1；

Fig. 3 be Fig. 1 from another angle when stereoscopic schematic diagram；

Fig. 4 to fig. 6 is the schematic diagram when clearance checking scale of the utility model is evaluated for soft tissue；

Fig. 7 is the partial enlarged view of the second distraction plate and the first distraction plate that show the utility model；

In figure：1st, ontology；11st, cavity；12nd, noumenon function portion；13rd, ontology handle part；14th, mounting hole；15th, horizontal perforation Slot；2nd, adjusting knob；21st, the second shaft；22nd, pass through portion；3rd, the first distraction plate；4th, the second distraction plate；41st, sliding part；42nd, turn Dynamic portion；43rd, axis pin；5th, gear；51st, first rotating shaft；6th, rack；71st, graduation mark；72nd, observation window；73rd, graticule；91st, through hole； 92nd, through hole.

Specific embodiment

Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, these embodiments are provided so that this practicality is new The design of example embodiment fully and completely, and comprehensively will be communicated to those skilled in the art by type.It is identical in figure Reference numeral represents same or similar structure, thus will omit their detailed description.

Referring to Fig. 1 to Fig. 7, the utility model embodiment discloses a kind of clearance checking scale, which is used for Total knee replacement is performed the operation.The clearance checking scale includes ontology 1, adjusting knob 2, the first distraction plate 3, the second distraction plate 4, gear 5th, rack 6 and measuring device.

Referring to Fig. 1, Fig. 2 it is found that the ontology 1 includes ontology handle part 13 and noumenon function portion 12, the ontology handle part 13 Shape for handle, held for operator, which is located at the top of ontology handle part 13.First distraction plate, 3 He Second distraction plate 4 is used cooperatively, to strut the gap between shin bone and femur.First distraction plate, 3 and second distraction plate 4 is substantially For tablet, wherein, the first distraction plate 3 is fixedly connected on ontology 1, which can directly be attached with ontology 1, Can also ontology be indirectly attached to by other parts by linkage function portion etc., in addition, first distraction plate 3 can with ontology 1 It is integrated, the two, which can be integrally cast or be connected through a screw thread again after manufacturing respectively, the modes such as weld, rivet carries out Connection.

Second distraction plate 4 is slidably connected to ontology 1 and can be slided up and down relative to the first distraction plate 3.Noumenon function portion When 12 front ends are connect with the second distraction plate 4, a vertical raised line can be set, it is fluted on the second distraction plate 4, by with noumenon function Raised line in portion 12 matches, and is slided up and down so as to fulfill the function part relative to ontology 1.Second distraction plate 4 can also include One sliding part 41 and a rotation section 42, what it is close to ontology 1 is sliding part 41, which can be relative to noumenon function portion 12 It slides up and down, can be slided up and down relative to the first distraction plate 3, rotation section 42 is then articulated in by axis pin 43 on sliding part 41 And positioned at the top of the first distraction plate 3.It should be pointed out that due to being fixedly connected between the first distraction plate 3 and ontology 1 Therefore relationship, even if when sliding part 41 is slidably connected to the first distraction plate 3, is still also considered as being slidably connected to ontology 1 On.

Relative motion between second distraction plate 4 and the first distraction plate 3 is by gear 5, rack 6 and adjusting knob 2 Collective effect realize.Rack 6 is fixedly installed on the second distraction plate 4, and is strutted positioned at first distraction plate 3 and second Between plate 4, which engages with rack 6 moves up and down for the second distraction plate 4 of driving.The gear 5 tool is set there are one level The first rotating shaft 51 put, the axis of the first rotating shaft 51 is horizontal, horizontally rotates and is arranged on ontology 1.Gear 5 and first Shaft 51 can be integrally machined into gear shaft, can also fabricate respectively, then be fixed by modes such as interference fits It links together.Gear can be spur gear, this hour rack is accordingly spur rack, which is alternatively helical gear, this hour rack phase It should ground selection helical rack.The opening for accommodating rack 6 is all provided on first distraction plate 3, it can between second distraction plate 2 and rack 4 Think integrally formed integral piece, can also be fixedly assembled by way of being detachably connected.

There are one the second shaft 21, which is rotatably arranged on ontology 1 tool of adjusting knob 2, and with first Shaft 51 is connected, and is rotated for band moving gear 5.When user rotates the adjusting knob 2 with finger, 2 band of adjusting knob Moving gear 5 is rotated, and gear 5 drives the second distraction plate 4 to move up and down again.

By Fig. 1 to Fig. 3 it is found that in the present embodiment, cavity 11, the adjusting knob are formed in noumenon function portion 12 2 are arranged in cavity 11, and in the inner wall tool of cavity 11, there are one the mounting holes 14 that are coaxially arranged with first rotating shaft 51；Second One end of shaft 21 is connected with first rotating shaft 51, and the other end is rotatably arranged in mounting hole 14, alternatively, the second shaft 21 is socketed When in first rotating shaft, first rotating shaft 51 is rotatably dispose in the mounting hole 14.Between second shaft 21 and adjusting knob 2 The integral piece that can be integrally formed can also be fixedly assembled by way of being detachably connected.When adjusting knob 2 with Second shaft 21 is when being detachably connected, first can be inserted into mounting hole 14, then assemble adjusting knob 2 by the second shaft 21 In the second shaft 21.It in addition, also can be by 2 and second shaft of adjusting knob, 21 disposable integral installation in mounting hole 14.

As shown in figure 3, in the present embodiment, mounting hole is through hole, the outer wall in the noumenon function portion 12, which is equipped with, to be prolonged Extend to the horizontal through slot 15 of the mounting hole 14.The width of the horizontal through slot 15 is less than the diameter of mounting hole 14.At second turn Axis 21 be equipped with can by the horizontal through slot 15, so that the second shaft 21, which is located in mounting hole 14, passes through portion.In this reality It applies in mode, (should only be shown in figure by the tangent plane 22 that axis of the portion including two opposite second shafts 21 is arranged symmetrically The tangent plane being located above).Width between two tangent planes is less than or equal to the width of the horizontal through slot 15.The tangent plane 22 It is more than or equal to the length of mounting hole 14 in the axial rectangular length of the second shaft 21.When in use, make the two tangent planes first 22 is parallel with horizontal through slot 15, then makes in 21 horizontal shifting of the second shaft to mounting hole 14.Second shaft 21 is again It axially moves, you can be attached with first rotating shaft 21.

In the other embodiment of the utility model, should cylinder be alternatively, and be less than by the diameter in portion by portion Equal to the width of the horizontal through slot 15, when in use, this can also be made to pass through portion and successfully pass through horizontal through slot 15.

In the junction of first rotating shaft and the second shaft, at least partly hollow, the hollow inner surface of second shaft 21 For polygon, the outer surface that the first rotating shaft 51 is connect with second shaft 21 is to coordinate with the second shaft inner surface Polygon, for example, in the junction of first rotating shaft and the second shaft, the hollow interior surface of first rotating shaft is regular hexagon, the The outer surface of two shafts is also regular hexagon, and section is equal to or slightly less than the regular hexagon inner surface of first rotating shaft, two shafts Regular hexagon can be combined together；Second shaft 21 can also be all hollow, is sleeved in first rotating shaft, and the two is also by phase interworking The polygon surface of conjunction is attached, and the section of the second shaft is equal to or slightly less than the regular hexagon inner surface of first rotating shaft.It should The connection mode of 51 and second shaft 21 of first rotating shaft is not intended to limit.The first rotating shaft and the second shaft can also pass through shaft coupling Etc. being attached.When using shaft coupling, the axial direction of first rotating shaft and the second shaft can not also overlap.

In the other embodiment of the utility model, the second shaft 21 on the adjusting knob 2 can not also be set, and be somebody's turn to do Mounting hole 14 is with first rotating shaft 51 to be coaxially arranged, and first rotating shaft 51 is rotatably arranged in the mounting hole 14, and adjusting knob 2 It is fixedly connected in cavity 11 and directly in first rotating shaft 51.

As shown in Figure 1, measuring device is for the gap A between the first distraction plate 3 of measurement and the second distraction plate 4.Due to The thickness of one distraction plate 3 and the second distraction plate 4 is certain, thus gap between 3 and second distraction plate 4 of the first distraction plate The gap between two bones can be directly or indirectly converted to.The specific constructive form of the measuring device is not intended to limit, as long as can Achieve the purpose that measurement gap.The measuring device can be formed directly on the second distraction plate 4, can also be used as individually Component is assemblied on the second distraction plate 4.As shown in figure 4, in the present embodiment, measuring device includes being set to the quarter of ontology Degree line 71 and the observation window 72 being set on second distraction plate 4, the graduation mark 71 is in ontology close to the second distraction plate Side, the outer rim of the observation window 72 is equipped with graticule 73, when the second distraction plate 4 moves up and down, can be shown in observation window 72 The graduation mark 71, graticule 73 are used to match to indicate the first distraction plate 3 and the with the graduation mark 71 shown in observation window 72 Gap A between two distraction plates 4.

As shown in Figure 7, consistency from top to bottom is additionally provided on the first distraction plate 3 and the second distraction plate 4 is used for insertion force line bar Through hole, wherein on the second distraction plate 4 be equipped with through hole 91, on the first distraction plate 3 be equipped with through hole 92.The two The axis of through hole is to overlap.

Referring to Fig. 4 to Fig. 7, due to being the relationship being mutually pivotally connected between the sliding part 41 of the second distraction plate 4 and rotation section 42, Rotation section 42 is pivotally attached to the axis line position of rotation section by a pin, thus, when the second distraction plate 4 and the first distraction plate 3 are inserted When entering to spatium interosseum, it can be used for the evaluation of soft tissue balance.Wherein, as shown in figure 5, when soft tissue balance situation is preferable, 42 and first distraction plate of rotation section, 3 substantial equilibrium, as shown in FIG. 6 and 7, when soft tissue balance situation is poor, the rotation Portion 42 can tilt in lower section or lower right to the left relative to the first distraction plate 3.Doctor can be according to the inclination feelings of rotation section 42 Condition judges the soft tissue balance situation at spatium interosseum.

The use process of the clearance checking scale of the utility model embodiment is as follows.

After proximal tibia osteotomy and distal femur osteotomy is completed, the proximal tibia and distal femur be provided with it is certain between Gap, when for stretching gap, which is located at distal femur osteotomy surface and proximal tibia is cut Between bone face, when for buckling gap, which, which is located at femur four-in-one osteotomy plate bottom, puts down Between face and proximal tibia osteotomy surface.

Doctor only needs a hand holding body 1, you can operates the clearance checking scale of the utility model.First is strutted first 3 and second distraction plate 4 of plate is inserted into the gap between femur and shin bone, and then, the ontology 1 of holding with a firm grip rotates adjusting knob 2, In the process, the second shaft 21 drives first rotating shaft 51 to rotate, which rotates with moving gear 5, the then band of gear 5 Carry-over bar 6 upwardly or downwardly moves.In the process, measuring device realizes strutting for gap, can also measure this second Thus the distance between 4 and first distraction plate 3 of distraction plate size achievees the purpose that measure gap size between femur and shin bone. Rotation section 42 of the doctor by observing the second distraction plate 4 can also carry out soft tissue relative to the inclined degree of the first distraction plate 3 Balance evaluation.

In conclusion the clearance checking scale of the utility model can simplify operating procedure, three are realized in same step Kind of function is realized and is stretched or the strutting of buckling gap, soft tissue evaluation and gap size measure.The gap of this clearance checking scale Value can be continuously adjusted between the minimum and maximum, and compared with the clearance measurement block of fixed thickness, operation is more flexible, and subtracts The quantity of surgical instrument is lacked.

It is particularly shown and described the illustrative embodiments of the utility model above.It should be understood that the utility model Disclosed embodiment is not limited to, on the contrary, the utility model intention covers included in spirit and scope of the appended claims Interior various modifications and equivalent arrangements.

Claims (10)

1. a kind of clearance checking scale, which is characterized in that including：

Ontology；

First distraction plate is fixedly connected on the ontology；

Second distraction plate is slidably connected to the ontology, can be slided up and down relative to first distraction plate；

Rack is fixedly installed on second distraction plate, and between first distraction plate and second distraction plate；

Gear is engaged with the rack for second distraction plate is driven to move up and down, and the gear is fixedly connected with one Horizontally disposed first rotating shaft, the first rotating shaft, which horizontally rotates, is set to the ontology；

Adjusting knob is connect with the first rotating shaft, for driving the gear rotation；

Measuring device, for measuring the gap between the first distraction plate and the second distraction plate.

2. clearance checking scale according to claim 1, the ontology includes ontology handle part and noumenon function portion, described Cavity is formed in body function portion, there are one the mounting hole with first rotating shaft coaxial line, the adjustings for the inner wall tool of the cavity Knob is set in the cavity, and the first rotating shaft is rotatably dispose in the mounting hole.

3. clearance checking scale according to claim 1, it is characterised in that：The adjusting knob has the second shaft, described Adjusting knob is connected to by second shaft in the first rotating shaft.

4. clearance checking scale according to claim 3, which is characterized in that the ontology includes ontology handle part and ontology work( Energy portion is formed with cavity in the noumenon function portion, and there are one the installations with first rotating shaft coaxial line for the inner wall tool of the cavity Hole, one end that the adjusting knob is set on second shaft in the cavity are connected with the first rotating shaft, and the other end turns It is dynamic to be set in the mounting hole.

5. clearance checking scale according to claim 4, which is characterized in that the mounting hole be through hole, the ontology work( The outer wall in energy portion is equipped with the horizontal through slot for extending to the mounting hole, and the width of the horizontal through slot is less than mounting hole Diameter, second shaft, which is equipped with, to pass through portion so that the second shaft is located in mounting hole by the horizontal through slot.

6. clearance checking scale according to claim 5, which is characterized in that described to include two this second turn relatively by portion The tangent plane of the axisymmetrical arrangement of axis, the width between two tangent planes are less than or equal to the width of the horizontal through slot, institute State the length that tangent plane is more than or equal to the mounting hole in the length of the second shaft axial direction.

7. clearance checking scale according to claim 1, which is characterized in that the measuring device includes being set to the quarter of ontology Degree line and the observation window being set on second distraction plate, the graduation mark of the measuring device are disposed in proximity to described second On the ontology of distraction plate, the outer edge of the observation window is equipped with graticule, when second distraction plate moves up and down, the observation window Interior to show the graduation mark, the graticule is used to match to indicate the first distraction plate with the graduation mark shown in observation window With the gap between the second distraction plate.

8. clearance checking scale according to claim 1, it is characterised in that：Second distraction plate includes the sliding part close to ontology And it is articulated in the rotation section of the sliding part.

9. clearance checking scale according to claim 1, which is characterized in that on first distraction plate and the second distraction plate The through hole for insertion force line bar equipped with consistency from top to bottom.

10. according to the clearance checking scale any in Claims 1-4,6 to 9, which is characterized in that the gear is straight-tooth Wheel, the rack are spur rack；Or the gear is helical gear, the rack is helical rack.